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Finding the Fourth Proportional to 157,572.80, 236,162.10 and 78,709.04

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Solution

The fourth proportional to 157,572.80, 236,162.10 and 78,709.04 is: 117,965.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,572.80 : 236,162.10 = 78,709.04 : x
  2. Step 2: Convert to fraction form
    157,572.80/236,162.10 = 78,709.04/x
  3. Step 3: Cross multiply
    157,572.80x = 236,162.10 × 78,709.04
  4. Step 4: Simplify right side
    157,572.80x = 18,588,092,175.38
  5. Step 5: Solve for x
    x = 18,588,092,175.38/157,572.80
  6. Step 6: Final answer
    x = 117,965.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.